 Disputes with the mainstream labor movement finally led to the expulsion of FVdG members from the Social Democratic Party of Germany (SPD) in 1908 and the complete severing of relations between the two organizations.Anarchist and especially syndicalist positions became increasingly popular within the FVdG.During World War I, the FVdG rejected the SPD's and mainstream labor movement's cooperation with the German state—known as the "Burgfrieden"—but was unable to organize any significant resistance to or continue its regular activities during the war.